1.

Consider the first ionization energies of the elements whose electronic configurations correspond to the following. I. [He]2s^(2) 2p^3 II. [He]2s^(2) 2p^4 III. [Ne]3s^(2)3p^(1)[Ar]3d^(10)4p^1 Which of the above have almost the same first ionization energies?

Answer»

I and II
I and III
III and IV
II and IV

Solution :AL & Ga have approx. same first I.E. due to similar size (due to poor SHIELDING of d orbitals in Ga).


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